CVE-2026-126156 · Infrastructure
NO FIX YET · SEE WHAT TO DO
A flaw in Fortinet FortiMail's handling of user-controlled keys lets an unauthenticated remote attacker take over an arbitrary IBE recipient account using crafted HTTP requests. The attacker gets full control of the victim's secure-mail account without logging in.
first public Nov 11, 2026 · 1 source
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FortiMail appliances in the listed version ranges that expose IBE secure-mail features to the internet or to untrusted networks are exposed. Sites running other FortiMail versions or without IBE in use are not in the stated range; the sources do not say whether IBE must be enabled to be vulnerable.
Not affected if version-outside-listed-ranges
Who cares email-gateway, fortimail, ibe
A authorization bypass through user-controlled key vulnerability in Fortinet FortiMail 8.0.0 through 8.0.1, FortiMail 7.6.0 through 7.6.6, FortiMail 7.4.0 through 7.4.8, FortiMail 7.2 all versions may allow an unauthenticated remote attacker to take over an arbitrary IBE recipient account via crafted HTTP requests.
This page as .md · .json · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
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